The Atlantic right whales : a contribution embracing an examination of 1, the exterior characters and osteology of cisarctic right whale - male ; 2, the exterior characters of a cisarctic right whale - female ; 3, the osteology of a cisarctic right whale - sex not known ; to which is added a concise résumé of historical mention relating to the present and allied species. Bulletin of the AMNH ; v. 1, article 6.